If you want to know Can I take deodorant on a plane? Yes, it is generally allowed to bring deodorant with you on a plane. If you choose to bring deodorant in your carry-on, it must conform to the 3-1-1 rule of the TSA. This means that the deodorant container should not exceed 3.4 ounces (100 milliliters), and all containers must fit in a clear, quart-sized plastic bag.